Circular sawing machine.



No. 707,675. Patented Aug. 26, I902.

' H. J. GOLBUBN, Docd.

a. A. coLBunu & I. w. GDLBURN, Exacutors.

CIRCULAR SAWING MACHINE. ("0 Model.) (Application m 13 13. 19cm 3 ShBQh-Shafl! I.

Patented Aug. 26, I902.

H. J. GDLBURN, own. E. A. GOLBURN 8:. I. W. CDLBURII, Exocutors.

CIRCULAR SAWING MAGHINE.

(Application and m m. 1901.! 3 Sheets-Shoot 2.

(No Model.)

n1: NORM; Perms co. vnm'o-umou wnsnmmon, n. c.

No. 707,675. Patented Aug. 26, I902.

'H. J. CCLBUBN, Decd. E. A. CCLBUHN &. l. W. CCLBURN, Executors.

CIRCULAR SAWINC MACHINE. n mm. (Application fllod Dec; 12, 1901.) 3 Sheets-sheet 3.

THE mmms PETERS cm. woman-10.. WASHINGYON, u, c.

rrnn Sra'rns ATENT OFFICE.

HENRY J. COLBURN, OF TOLEDO, OI-IIO; ELIZA A. COLBURN AND IRVING W. COLBURN EXEOUTORS OF SAID HENRY J. COLBURN, DECEASED; IRVING IV. OOLBURN, ADMINISTRATOR, ASSIGNOR TO ELIZA A. COL- BURN, OF TOLEDO, OHIO.

CIRCULAR SAWING MACHINE.

5PECIFIGATION forming part of Letters Patent No. 707,67 5, dated August 26, 1902.

Application filed December 12, 1901. Serial No. 85,560- (Nomodel-l To all whom, it may concern:

Be it known that I, HENRY J. COLBURN, a citizen of the United States, residing at T0- ledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvementsin Ciro ular Sawing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to circular sawing machines for cabinet, model, pattern, and general joinery work, particularly that type of machine in which two saws are mounted on a reversible frame, so that either can be brought into operation at the will of the operator. The improvements consist, first, in improved means for adapting such a machine to the employment of both cross-cutting and ripping saws of difierent diameters and of maximum diameterand also of various widths or thicknesses to suit the various kinds of work to be accomplished, also grooving anddadoing tools to be substituted in place of saws, secondly, in improved means for facilitating cross-cutting and for cutting at the different angles required, all as hereinafter specified and claimed, and illustrated in the several drawings forming a part of this specification.

Referring to the drawings, Figure 1 is a plan view of the table, having a portion of its sliding top cut away to expose the differential rolls lying beneath said movable portion. Fig. 2 is a detached View of the sliding element of said table-top. Fig. 3 is a transverse vertical section of the main frame, sliding table-top, and connections, taken on line 3 3, Fig. 5, viewed from the front or in the direction of arrow y. Fig. 4 is a detail view of the swing-frame-supporting yoke. Fig. 5 is a longitudinal vertical section taken on line 5 5, Fig. 3, viewed from the left or in the direction of arrow w. Fig. 6 is a transverse vertical section showing main frame, tilting table, sliding table, bearing-rolls, and tilting device,taken on central line 6 6, Fig. 7, viewed from the left or in the direction of arrow .2. Fig. 7 is a longitudinal vertical section taken longitudinal vertical section of the frame and table, showing details of the worm-gear, elastic worm-shaft, and bearings for the latter, one of them adjustable. Fig. 12 is a side elevation of the tilting table broken away at the ends showing the supporting-ways for the adjustable portion and the operating handwheel viewed in the direction of arrow w, r

Fig. 3. Fig. 13 is a detail view, partly in section, showing the adjustable bearing supporting the resilient shaft and means of adjustment.

The top of the table of the machine is divided into two portions a and b, the latter of which is supported on transverse ways 0 c, on which the part b is adapted to be moved and adjusted toward the part a, leaving a crevice or slot d of adjustable width embracing the plane of the sawsin which the saws run. This adjustment is efiected and held constant by means of the screw 2 and hand-wheel f or equivalent means. The said adjustable table b is furthermore provided with a longitudinally-sliding portion g, carried on trackways h, borne on table 1), parallel to the plane of the saws, by means of a series of rollers t 2', formed with differential rolling membersj 7r of diiferent diameters, those of smaller diameter being adapted to roll on the trackways h and those of larger diameter j being adapted to carry the sliding table g. By this means the table I) can be moved back and forth with a minimum of friction, and owing to the differential character of the roller members the distance traversed by the rollers i is less than that traversed by the sliding table g in the same ratio as the respective diameters of the said roller members. Stop-pins m are located into operative position, as desired.

at spaced intervals on trackways hto limit the run of-the rollers to the customary range of the sliding table g; but said rollers will continue to revolve when at the limit of their range if the sliding table continues to move, owing to the superior leverage of the hearing membersj. Suitable saw-tablegages are employed on both the stationary table a and the sliding portion g.

At 13 I have shown a diagonal cutting-off fence adapted to be used with this machine, but do not herein claim the same, as it forms proper subject-matter for a separate future application.

The sliding table g is held in operative position relatively to the plane of the saws by its parallel edges contacting with the corresponding'parallel edges on the table b. The rollers t' are preferably formed integral throughout and have their smaller members hardened and ground concentric with the larger bearing portions j.

14 is the main frame of the machine, on which is supported the reversing-frame 15, which carries the saws, by means of a journaled arbor 16 17, mounted in bearings 18 19, so as to be capable of rotation with its sawcarrying frame 15,thereby bringing either saw This rotation is effected and the frame also held locked in the desired position by means of the worm-gear 20 on the extremity of arbor 16 and worm 21, actuated by hand-wheel 22.

23 is the worm-shaft, which is heldin bearings 24 25, the latter bearing being located intermediately between bearing 24 and the worm at such a distance from the worm as to admit of someyielding or springing of the elastic shaft 23, so that when the worm is pressed closely into mesh with the worm-gear 20 by'adjustment means provided a constant elastic contact of the worm with the wormgear will be maintained.

42 43 are collars on shaft 23. The bearing 25 is adjustable up and down by means of adjusting-screw 26, the bearing beingslotted at 44 and confined by a bolt 45 or other suitable and equivalent means, so as to give it sufficient vertical play to admit of the requisite adjustment.

41 is the housing for the worm-gear.

The frame 15 carries two arbors 27 27, with driving-pulleys 28 28 and saws 29 30 mounted thereon. I-Ieretofore the size of these saws was limited by the distance from the sawarbor to the frame-arbor 16, except in that species where the said frame-arbor was supported from one end only, which was not the most stable form of support. The prime object of this present improvement is to enable a saw of much greater diameter to be used than was possible with the former style of arbor supported at both ends and still retain a support or bearing on both sides of the saw plane. This I accomplish by the improved means about to be described.

In Fig. 4: is shown a yoke 31, formed integrally with outerjournal17,of sufficient reach to extend around a saw of the maximum diameter that it is desirable to employ when in the position shown in Fig. 10 and of a width of opening to embrace any desired style of saw; also, provided with some means for adjustably securing it to saw-frame 15, so as to be capable of being set in an axial plane making any required angle with the frame plane. As a simple means to this end I have shown in Figs. 3 and 4 at 32 a sleeved connection between the yoke and the saw-frame with a clamp-screw 33, by which the sleeve can be socured to the frame or loosened thereon for readjustment; but any equivalent means,many of which will occur to a skilled mechanic,will do as well. When the two parts are clamped at the desired angle, the frame 15 and yoke 31 are rotatable as one piece, arbor 16 and journal 17 being in alinement. The diagrams Figs. 9 and 10 illustrate the mode of using the yoke both for saws of equal and unequal diameters. When saws of maximum equal size are used,the yoke is placed, as in Fig. 9- t'. e., horizontallyso that its joining portion a shall clear the peripheries of the saws, even though said saws should extend within the limits of the frame-arbor. WVhen a saw of maximum radius, as 29, Fig. 10, is desired to be employed, in conjunction with a saw of small radius, 30, Fig. 10, the yoke is set in the position shown in Fig. 10, so as to clear both peripheries, as before, although in this case the larger saw may extend far beyond the limits of frame-arbor 16. The setting of the yoke to the required angle with frame 15 may be accomplished by first loosening clamp-screw 33, then rotating yoke 31 about the axis of frame 15 on the sleeved portion to the desired plane angle, then tightening the clamp-screw or other equivalent means for clamping the parts together, when the yoke and frame will be rigidly secured together and can be rotated simultaneously to any desired position to bring either saw into operation by means of hand-wheel 22, worm-gear 21, and worm 20. The relative position of the yoke, saws, and reversible frame when saws of equal diameter are used is also illustrated in Fig. 7.

Fig.6 represents table a in a tipped or tilted position for the accomplishment of various kinds of sawing at an angle, to which this machine is adapted.

Fig. 8 shows in sectional detail the construction of the tilting joint.

34 is a sector securely attached to table a and resting upon a correspondingly-curved member 35, which is firmly secured to main frame 14. Sector 34 is formed with a projecting curved flange or lug 36, which engages with a corresponding flange 37 on the member 38, which latter is bolted or otherwise secured to part.35. When it is desired to tilt the table Ct, the sector 34 slides upon part 35, being held in secure contact by the flanges 36 37. When it comes to rest at the desired angle, it is secured in position by curved slotted guide 39 and clamp-nut 40. The slot.

d in the plane of the saws must be adjusted prior to tilting by means of the adjnstingscrew 6 to a sufficient width to accommodate the saw projecting therethrough. The provision of the elastic contact of the worm with its gear is for the purpose of causing the worm to maintain a close mesh with the worm-gear, and thereby compensate for wear and any slight imperfection in the contacting surfaces.

In practice the top of the sliding portion g of the table should be slightly higher than the general level of the table to enable the material carried on the said sliding portion to easily clear the stationary portion of the table as it is moved thereon, and thus avoid undue friction.

I claim and desire to secure by Letters Patent- 1. In a circular sawing machine, a rotary reversible saw-frame, means for reversing the same, revoluble saws in one plane carried by said frame, journal-supports for said frame on each side of the plane of the saws, and a jonrnaled yoke, embracing the saw plane, connected with said frame, and forming with its journal the outer support of said sawframe, substantially as specified.

2. In a circular sawing machine, a rotary reversible saw-frame, means. for reversing said frame, revoluble saws in one plane carried by said frame, journal-supports for said frame, on each side of the plane of the saws,

a journaled yoke embracing the saw plane connected with said frame, forming with its journal the outer support of said saw-frame, and means for adjustably securing said yoke to said frame at an angle in any desired axial plane relative to the frame plane, substantially as specified.

3. In a circular sawing machine, a journaled reversible saw-frame, carrying revoluble saws in one plane, a yoke embracing said saw plane, connecting the journaled portions of said sawframe, a sleeved connection rotarily adjustable, between said yoke and said frame, and means for releasing and clamping said sleeved connection in any desired angular position between the yoke plane and the frame plane respectively, substantially as specified.

4. In a circular sawing machine, a rotary reversible saw-frame carrying revoluble saws mounted in one plane, a table having a fixed portion, a movable portion adjustable toward and from the fixed portion, a sliding portion between said fixed and adjustable portions, movable in a direction parallel to the plane of the saws, and means for positively adjusting the distance between the adjustable and fixed portions, substantially as specified.

5. In a circular sawing machine, a main frame, a rotary reversible saw-frame carrying revoluble saws mounted in one plane, a table having a fixed portion, a movable portion adjustable toward and from the fixed portion, a sliding portion between said fixed and adjustable portions, mounted on the latter, movable in a direction parallel to the plane of the saws, and laterally adjustable with said adjustable portion to regulate the width of the saw crevice, and pivotal means for tilting said tables and retaining them in a tilted position, substantially as specified.

6. In a circular sawing machine, a rotary reversible saw-frame carrying revoluble saws mounted in one plane, a worm-gear axially mounted on said reversible frame, a resilient worm-shaft carrying a worm in engagement with said worm-gear, a means for operating said worm-shaft, and bearings for said wormshaft, one of which is adjustable and located intermediate between the other bearing and the worm, at some distance from the latter, whereby when the worm is adjusted in close mesh with the worm-gear it is retained in elastic contact therewith by the resiliency of the worm-shaft, substantially as specified.

7. In a circular sawing machine, a main frame, a rotary reversible saw-frame, carrying revoluble saws mounted in one plane, a table having a fixed portion, a movable portion adjustable toward and from the fixed portion, a sliding portion in substantially the same plane with the said adjustable portion, movable on rollers in a direction at right angles to the movement of the adjustable portion, and a cutting-off gage mounted on said sliding portion, substantially as specified.

8. In a circular sawing machine, reversible saws mounted in one plane, a fixed table, a movable table adjustable toward and from the fixed table, a transversely-sliding table between said fixed and adjustable tables, adjustable with the latter, supporting-rollers beneath said sliding table, carried on said adj ustable table, and means for maintaining said sliding table and rollers in operative parallelism with the plane of the saws, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY J. COLBURN.

Witnesses:

ELISHA B. SOUTHARD, JOHN W. HAOKE'IT. 

